Refrigerating receptacle



; March 1935- c. KUHNEL ET AL REFRIGERATING RECEPTACLE Filed Feb. 9, 1933 Patented Mar; 12, 1935 UNITED STATES PATENT OFF-ICE Rauscher, Berlin-Niederschonhausen,

Ger-

many, assignors to Siemens-Schuckertwerke Aktiengesellschaft, Berlin-Siemensstadt, Germany, a corporation of Germany Application February 9, 1933, Serial No. 655,874 In Germany February 12, 1932 8 Claims.

Our invention relates to refrigerating receptacles, and more particularly to an evaporator for such receptacles.

Small-size refrigerating receptacles are, as a rule, designed as refrigerators or refrigerating boxes of the annular or square form, whose cooling chamber is accessible through a removable cover arranged on the top thereof. In such re-' frigerating-receptacles, the cold air cannot escape even upon the frequent removal of the cover owing to its heavier specific gravity as com-,-,. pared with the surrounding hot air so that the losses of refrigeration are smaller, thus minimizing the consumption of energy.

The arrangement of the evaporator of the refrigerating apparatus encounters difficulties in the refrigerating receptacles of the above character. If the evaporator is located in-the lower part of the cooling chamber, only the air contained in the'lower portion is cooled down, which air, as a result of its specific gravity remains in the lower portion thereof so that the goods contained in the upper portion of the cooling chamher are only cooled to a slight extent.

The object of our invention is to overcome the foregoing drawbacks. To this end, we provide in the upper portion of the cooling receptacle an annular or frame-shaped evaporator, said evaporator being preferably placed in an enlarged top section thereof. In this manner a good cooling effect aswell as proper utilization of space is attained without impairing the accessibility to the cooling chamber. The cold air surrounding the evaporator flowsdownwards along the entire periphery of the'evaporator as a result of its specific gravity, whereas the warmair is superseded by the downwardly flowing cold air; it is thus caused to fiow upwardly and is again cooled on the walls of the evaporator. Consequently, a natural circulation of air takes place so that the goods contained in the cooling chamber are cooled by the cooling air to the required low temor angular cross-section is particularly suitable for this purpose. In the case of an evaporator having an angular cross-section, the containers for the production of ice cubes are arranged between the evaporator and the inner wall of the cooling chamber.

In order to attain a uniform production of refrigeration over the entire periphery of the evaporator, it is advisable to design the interior of the evaporator in such a manner that the refrigerant is caused to pass through the entire evaporator before it is drawn out in a gaseous state therefrom. To this end, a partition may, for instance, be arranged in the evaporator at one side of which the liquid refrigerant is supplied and at the other side thereof the vaporous refrigerant is drawn out therefrom. The inlet and outlet for the refrigerantmay also, if desired, be disposed at diametrically opposite points of the evaporator.

In the accompanyingfldrawing are illustrated two embodiments of our invention in diagrammatic form; like numerals of reference denoting like parts.

Fig. 1 shows a cross-section of a cooling receptacle embodying our invention.

Fig. 2 shows in plan view a modified form of Fig; l with the cover removed. 9

Referring to Fig. 1, 13 denotes an evaporator which is located in the upper portion of an annular cooling box 11, whose inner space for the reception of the goods-to be cooled is accessible through a cover 12, the cross-section of said evaporator being of the angular shape. Between the perpendicular wall 14 of the evaporator and the inner wall 15 of the cooling chamber containers 16 are placed which are filled with water for the purpose of producing artificial ice cubes. be distributed over the evaporator 13, since they constitute separate units. They are dimensioned in such a manner that the ice cubes have the proper size for domestic purposes, so that any desired amount of ice may be produced by the use of such containers.

The liquid refrigerant is supplied to the evapzorator from outside by means of a conduit 1'7 leading from a fioat valve (not shown). The conduit 17 extends downwardly within the evaporator sufliciently, so as to dip for a certain dis- Any number of such containers 16 may tance into the liquid refrigerant contained in the lower part of the evaporator. Thegaseous refrigerant developed is drawn out of the evaporator 13 through the-conduit 18 which leads to the suction side of. a compressor (not shown).

.In order to produce an approximately uniform refrigeration over the entire periphery of the annular evaporator, a partition 19 is arranged between both conduits 1'7 and 18 so that the liquid refrigerant must flow through the entire evaporator before it can be drawn out of the latter in gaseous form through the conduit 18. Instead of the partition 19, the supply conduit 17 for the liquid refrigerant as shown inFig. 2 may be provided with an extension 20 arranged in the lower part of the evaporator 13, the conduit 20 terminating at a point which is diametrically opposite to the conduit 17. Also in this case the refrigerant must, consequently, flow at first through the entire evaporator before it is drawn out of the same in a gaseous state by the conduit 18.

As will be apparent from Fig. 1, the inner wall 15 of the cooling chamber is flared at its upper part so as to make room for the evaporator 13. It is thus possible to design the refrigerating receptacle in such a manner that the inner diameter of the evaporator will approximatively equal the inner diameter of the cooling chamber so that the accessibility to the latter is by no means impaired by the evaporator.

' The refrigerant receptacle according to the invention is suitable both for eatables of the vari-- ous kinds and for liquid goods as milk and the like, since the liquid contained in the pot-shaped cooling receptacle is uniformly cooled by the annular evaporator.

' We do not limit ourselves to the precise design of .the refrigerating receptacle shown as variationsmay be. made therein without departing from the scope and the spirit of our invention.

' Weclaim as our invention: 1. In a refrigerating receptacle, in combination .-i-with a refrigerating apparatus, an annular evaporator, a vertical cooling chamber open at its upper end, said evaporator being disposed within ply and discharge of the refrigerant to and from said evaporator, said conduits being connected to said evaporator so as to cause a uniform evaporation of the refrigerant over the entire periphery of said evaporator.

2. In a refrigerating receptacle, in combination with a refrigerating apparatus, an annular evaporator, a vertical cooling chamber open at the top, said evaporator being disposed within the cooling chamber along the periphery of its entrance, and being exposed on all sides to the interior of said chamber, a removable cover for said receptacle, said cooling chamber being acces'- sible through said cover, conduits for the supply and discharge of the refrigerant, said conduits being connected to said evaporator in spaced relation to one another and a transverse partition between said conduits across the interior of said evaporator.

3. In a refrigerating receptacle, in combination with a refrigerating apparatus, an annular evaporator, a verticalcooling chamber open at the top, said evaporator being disposed within the cooling chamber along the periphery of its en- 'trance, and being exposed on all sides to the interior of said chamber, a removable cover for said receptacle, said cooling chamber being accessible through said cover, conduits for the supply and discharge of the refrigerating medium, said 'conduits terminating at diametrically opposite points of the interior of said evaporator.

4. In a refrigerating receptacle, in combination with a'refrigerating apparatus, an annular evaporator, a vertical cooling chamber open at its upper end, said evaporator being disposed within the cooling chamber along the periphery of its entrance, and being spaced from the chamber walls to expose all refrigerating sides to the interior of said chamber, a removable cover for said receptacle forming when closed a part of the cooling chamber walls, said cooling chamber being accessible through said cover, said evaporator being attached to one of the walls enclosing said chamber.

5. In a refrigerating receptacle, in combination with a refrigerating apparatus, an evaporator having an angular cross-section, a vertical cooling chamber open at its upper end, said evaporator being disposed within the coolingchamber along the periphery of its entrance, and being spaced from the chamber walls to expose all refrigerating sides to the interior of said chamber, and a removable cover for said receptacle forming when closed a part of the cooling chamber walls, said cooling chamber being accessible through said cover, said'evaporator being attached to one of the walls enclosing said chamber.

6. In a refrigerating receptacle, in combination with'a refrigerating apparatus, an annular evaporator, a cooling chamber, said evaporator being disposed within the cooling chamber along the periphery of its entrance, and being spaced from the chamber walls to expose all refrigerating sides to the interior of 'said chamber, a removable cover for said receptacle forming when closed a part of the cooling chamber walls, said cooling chamber being accessible from above through said cover, containers for the production of ice, said containers being disposed around said evaporatorbetween it and the chamber wall, said evaporator being attached to one of the walls enclosing said chamber.

7. In a refrigerating receptacle, in combination with a refrigerating apparatus, an annular evaporator, a vertical cooling chamber open at the top, said evaporator being disposed within the cooling chamber along the periphery of its entrance, and being spaced from the chamber walls to expose all refrigerating sides to the interior of said chamber, a removable cover for said receptacleforming when closed a part of the cooling chamber walls, said cooling chamber being accessible through said cover, conduits for the supply and discharge of the refrigerant, said conduits being connected to said evaporator in spaced relation to one another and means for directing the fiow of the refrigerant through the annular evaporator, said evaporator being attached to one of the walls enclosing said chamber.

8. A vertical refrigerating chamber open at the top and having a peripherally enlarged top section, an annular evaporator disposed in said enlarged top section and being spaced from the chamber walls to exp Jse all refrigerating sides to the interior of said chamber, the inner contour of said evaporator being in line with the contour of the remainder of said chamber, said evaporator being attached to one of the walls enclosing said chamber.

CARL Ki'IHNEL. EDUARD RAUSCHER. 

